I'd rather have marijuana advertised to kids than alcohol or cigarettes, both drugs are infinitely more bad for you.
The day booze is prescribed to cancer patients and people in severe pain, or cigarettes helps fight off the lung cancer it creates is the day that I will think otherwise.
So it's not much different from anything else out there.
The only reason people kill over marijuana is because of the illegal prohibition on it, and the only reason people have a negative view of it is because of government fear mongering.
Oh well. This is the world we live in.